stratum working, implement mining pool, support "extranonce"

MINE/rin/start_stratum_proxy.sh

@@ -30,8 +30,31 @@ python3 -c "import requests" 2>/dev/null || {
 }
 
 echo "✅ Python dependencies ready"
-echo ""
 
+# Check if port 3333 is already in use
+if netstat -tln | grep -q ":3333 "; then
+    echo ""
+    echo "⚠️  Port 3333 is already in use!"
+    echo ""
+    echo "🔍 Process using port 3333:"
+    sudo netstat -tlnp | grep ":3333 " || echo "Could not determine process"
+    echo ""
+    echo "🛑 To kill existing process:"
+    echo "sudo lsof -ti:3333 | xargs sudo kill -9"
+    echo ""
+    read -p "Kill existing process and continue? (y/N): " -n 1 -r
+    echo
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        echo "Killing processes using port 3333..."
+        sudo lsof -ti:3333 | xargs sudo kill -9 2>/dev/null || echo "No processes to kill"
+        sleep 2
+    else
+        echo "Exiting..."
+        exit 1
+    fi
+fi
+
+echo ""
 echo "🚀 Starting Stratum Proxy Server..."
 echo "This will bridge cpuminer-opt-rin to your RinCoin node"
 echo ""